I respect your opinion.
Here's how I see this cross...they have the characteristics of both the Rio Nanay and the Manacapuru. They have the high body, the spotting and the altum-like appearance with a very pronounced nasal notch which they got from the Rio Nanay. At the same time, there was the added red coloration on it's back that they got from the Red Shoulder Manacapuru. On top of it all, the fins are full and very erect.
Again, nothing wrong with just having a Manacapuru or having the Rio Nanay in itself.